The passage is mainly about ______. A: an approach to patents B: the application for patents C: the use of patents D: the access to patents

There are （） types of patents in China.

‎There are （） types of patents in China.‍

There are t（） types of patents in China. A:

Which of the following statements is true about patents and copyrights?

Patents,<br/>trademarks and copyrights are all issued by the PTO.( )

Tangible property includes patents, designs, copyrights, and trademarks. （ ）

通常所说的美国工程索引指的是Engineering Village平台上的（）数据库。 A: inspec B: Compendex C: US Patents D: EP Patents

The difference between an invention patent and a utility model patent is (). A: Invention must be the proposal and innovation of new methods B: The utility model must be a product with shape and structure C: The creative requirements of utility model patents are lower than invention patents D: Some products cannot declare utility model patents

在Engineering Village检索平台中，代表“EI工程索引”的数据库名称是（） A: Inspec B: Compendex C: US Patents D: EP Patents